package com.jiazhong.text;

import java.util.Scanner;

public class Test05 {
    public static void main(String[] args) {
        double sum=0;
        int day;
        for (day=1;sum<=100;day++){
            sum+=2.5;
            if (sum%5==0)
                sum=sum-6;
        }
        if (sum==100){
            System.out.println(day);
        }
        else{
            day+=1;
            System.out.println(day);
        }
    }
}
